Q15: A Boeing 747-400 has a total wing area of 525 m and a maximum takeoff mass of 397,000 kg. Suppose that while flying at cruising altitude (10,700 m), the speed over the bottom of the wing is 246 m/s. What must be the airspeed over the top of the wing in order for the plane to maintain altitude? The density of air at 10,700 m is 0.400 kg/m. Assume ideal fluid flow. 7 FO Hint F2 #3 Mark for Review Confidence 80 F3 m/s $ 54 4 DOO F4 0 % 5 F5 Submit Answer Finish Assignment, ( ^ 6 F6 & 887 17